<?php
/*
 * This product includes software developed at
 * Google Inc. (http://www.google.es/about.html)
 * under Apache 2.0 License (http://www.apache.org/licenses/LICENSE-2.0.html).
 *
 * See http://google-api-dfp-php.googlecode.com.
 *
 */
class OAuthSignatureMethod_HMAC_SHA1 extends OAuthSignatureMethod {
    function get_name() {
        return "HMAC-SHA1";
    }

    public function build_signature($request, $consumer, $token) {
        $base_string = $request->get_signature_base_string();
        $request->base_string = $base_string;
        $key_parts = array($consumer->secret, ($token) ? $token->secret : "");
        $key_parts = OAuthUtil::urlencode_rfc3986($key_parts);
        $key = implode('&', $key_parts);
        return base64_encode(hash_hmac('sha1', $base_string, $key, true));
    }
}
